Straightway valve



(No Model.)

n J. PUWBLL. STRAIGHTWAY VALVE.

No. 534,004. Patented Peb. l2, 1895.

ma "onlus PEYEHS co, Pnmcnwmo., wAsnmaToN, o. c.

JAMES POWELL, OF AVONDALE, OHIO.

sTRAiGl-ITWAY VALVE.

SPECIFICATION forming part of Letters Patent No. 534,004, dated February12, 189.5.

Application filed May 21, 1894. Serial No. 511,923. (No model.)

To @ZZ whom, it may concern.-

Be it known that I, JAMES POWELL, a citizen of the United States,residing at Avondale, in the county of Hamilton Vand State of Ohio, haveinvented certain new and useful Improvements in Straightway Valves; -andI do hereby declare the'follovvingy to be a full, clear, and exactdescription of the invention, reference being had to the annexeddrawings, which form part of this specification.

This invention relates to those straightway valves which include a pairof disks loosely coupled to a vibrating lever operated by a rock-shafthaving an external handle,and my improvement comprises a novelcombination of devices which compels such disks to be held very firmlyagainst their seats when the valve is closed.

It has been customary, heretofore, in valves having disks operated by aswinging lever and rock-shaft, to construct the sides or walls of theshell or casing with a curve or bulge, corresponding to the radial sweepof the lever and its accompanying valve-disks, in the act of opening orclosing the valve, said curvature being determined by the length oftraverse andthe distance between the axis of the vrock shaft and theopposite edges of the valve disk. This construction necessitatesconsiderable space Within the shell or casing, thereby rendering itbulky and unsightly, and adding materially to the cost of manufacture. l

In my improved construction, Idispense` entirely with this objectionablebulge or curve,

and makethe Walls parallel with each other, thus reducing the sizeandWeight of the valve-body, or shell, and adding very much to theappearance of the same. Furthermore, this improved construction compelsthe Valve disks to be held firmly against the shell, when closed, While,at the same time, they can be readily moved from a closed to a wide-openposition with very little friction. This result is attained by animproved and I'novel construction of the actuating lever which carriesthe valve disks; said improvement consisting of a longitudinal slot orgroove inthe lever which groove receives the studs or pivots of thevalve-disks, in order that said pivots may traverse said groovein theactof opening and closing the valve. f

Another important feature of my improved construction is the rotatingeect produced,

on the valve-disks inl the actl of opening and disks' and theirrespective seats and insuring Va perfectly tight joint.

In Letters PatentfNo. 409,334, issued August 20, 1889, I have shown anddescribed a peculiar form of expansionplate for closing a pair ofdisk-valves carried by a verticallyacting stem; but by a slightmodification ot this plate l enable it to operate with a pair of valvesloosely coupled to a vibrating lever.' Consequently, the utility of saiddevice is greatly enhanced, without deviating from the spirit of myinvention, as hereinafter more fully described. v

In the annexed drawings, Figure l is a vertical sectionof astraight-Wayvalve embodying my present improvements, said section being taken in theplane ofthe vibrating lever, andthe water-Way closed. Fig. 2 is ahorizontal section of the valve taken at the line Z-Z of the precedingillustration. Fig. 3 is a plan of the valve, the cap being detached fromthe shellor casing. Fig. 4 is an illustration including YVa verticalsection, a

side elevation, and ahorizontal section ofthe expansion plate.

of a modification of the invention,

The shell or casing A of the cock 'may be `of any desired size, shapeand material, and

is provided with the customary pipe-ends B, B', traversed by straightWater-Ways b, b', which latter `are axially in line Witheach other.Situated betweenthe'sepipe connections isa Valve chamber Celos/ed at topby a readily-detachable cap D, from whose under vvside a stop dprojects, for a purpose that will presently appear.

E, E', are annular seats near the bottom of chamber C, and F, F', arethe' disk-valves adapted to close against said seats, the inner, ornon-eective vfaces of said valves, being provided with short pivots f,f,adapted to travel freclywithin a longitudinal slot g of lever G. Thefree end of said lever vibrates up and 'down within the chamber C, whichmovement is eected by providing the other end of the lever with an eye gthrough which Fig. 5 isasectiouized plan IOO is passed the square h, ofa rock-shaftH, which latter, after passing through a stuffing-box I, hasan external handle J attached to it.

Chamber C has guides K, K', that confine the valves F, F', to a properpath, and, in addition to these guides, said chamber has grooves L, L',the latter being designed for the reception of a bodilydetachableexpansion-plate, the peculiar features of which are more clearly seen inFig. 4. Reference to this illustration shows that said plate has, atbottom, a semi-annular portion, or half ring M, of the same curvature asthe bottom of chamber C, and that a vertical-tongue N projects from oneend of said half-ring. n is a perforation near the top of this tongue toreceive a screw n', wherewith the expansion plate is secured in theshell, so as to have a limited movement therein, to compensate forexpansion, or inaccurate fitting.

fm, m', are wedges at the ends of the halfriug M, which wedges are widerin front and at bottom than at rear and top. m" is another wedge thatmay be located at the center of said ring, if desired, but the omissionof this third wedge from Fig. l shows that its use is not imperative.

In tting up this valve, the expansion plate must first be applied to theshell, which is readily done by dropping said plate down within thegrooves L, L', and causing the tongue N, to enter the groove L,afterwhich act, said plate is loosely held in place by the screw 7t,as seenin Figs. l and 3. The pivots f,f, of valves F, F', are then insertedwithin the slot g of lever G, and the latter is passed down within thechest C, care being taken to bring its eye g to such a position as toadmit the square h, of rock shaft H. As soon as this connection is made,the free end of the lever, with its coupled valves, is allowed to dropdown within the valve-chamber C, and when the cap D and stuflingbox Iare secured in place, the valve is at once ready to be applied to a setof pipes for conveying steam or fluids.

Now, by referring to Fig. 2 it will be noticed that the pivotsjif, ofthe valves are not in Contact with each other, and therefore, each valveis capable of being indepen dently seated, which seating is effected bythe inclined bearings m, m',wedging against the backs of said disks F,F. Consequently, these independently-seating valves effectually closethe channels 11,19', of the shell, and thus prevent the passage ofwater, steam or other fluid,

To open the valve, it is necessary only to operate the handle J in sucha manner as to swing the lever G up to the position indicated by dottedlines in Fig. l, and as soon as the free end of said lever strikes thestop d, the disks F, F', will clear the water-Ways t), b', the valvesbeing confined to a proper path by theirlperipheries bearing against theguides K, K

In the modification of my invention, seen in Fig. 5, the lever-proper,G, is reduced in thickness near its free end, and has perforations `q-toadmit pins g, that project laterally from a counter-lever G. 9 arelongitudinal grooves in these levers G', G, to receive the pivots f ofthe valves F F". Mis a half-ring having wedges m" that force the leversapart when they are swung down to close the valves. In this constructionit will be necessary to afford a slight lateralplay of the lever G', outhe rock shaft, to enable said lever to be shifted by the Wedges.

In my patent, previously referred to, the expansion Vplate has inclinedbearings both above and belowthe center of the fluid ways, but in thepresent case I dispense with one set of wedges and arrange saidexpansion plate with single inclined-bearings or Wedges on oppositesides of the water or Huid-way. By this arrangement the essentialfeature of my old invention is made available in a new form of valvehaving a very great range of utility.

I claim as my inventionl. The combination, in a straight-way valve of ashell having a pair of channels; a cham ber provided with a pair ofguides and two opposing valveseats; a vibrating lever whose free endswings within said chamber, and is grooved or slotted longitudinally;and a pair of valves loosely coupled to said lever; the arrangement ofthese devices being such as to confine said valves to a rectilineal pathwhen the free end of said lever describes an arc of a circle,substantially as herein described, and for the purpose stated.

2. The combination,inastraight-way valve, of the shell A, having a pairof channels b, b'; a chamber C, provided with a pair of guides K,K twovalve-seats E, E', and a detachable expansion-plate M, having wedges m,m; a vibrating lever G, whose free end swings within said chamber C, andis grooved or slotted longitudinally at g; and a pair of valves F,F',having pivots f,f, that traverse said slot; the arrangement of thesedevices being such as to confine said valves to a rectilineal path,within said guides K, K', when the free end of said lever describes anarc of a circle, all as herein described, and set forth.

In testimony whereof I affix my signature in presence of two witnesses.

` JAMES POWELL. Witnesses:

JAMES I-I. LAYMAN, ARTHUR MOORE.

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